Unleashing the Power of Graphene-Based Nanomaterials for Chromium(VI) Ion Elimination from Water

被引：4
作者：
Jibin, Keloth Paduvilan [1 ]
Augustine, Silpa [2 ]
Velayudhan, Prajitha [1 ]
George, Jesiya Susan [1 ]
Sidharthan, Sisanth Krishnageham [3 ]
Poulose, Sylas Variyattel [4 ]
Thomas, Sabu [1 ,3 ]
机构：
[1] Mahatma Gandhi Univ, Sch Chem Sci, Kottayam 686560, India
[2] Baselius Coll, Dept Chem, Kottayam 686560, India
[3] Mahatma Gandhi Univ, Int & Interuniv Ctr Nano Sci & Nanotechnol, Kottayam 686560, India
[4] Mahatma Gandhi Univ, Sch Environm Sci, Kottayam 686560, India
来源：
CRYSTALS | 2023年 / 13卷 / 07期
关键词：
heavy metals; graphene oxide (GO); graphene-oxide-coated silica nanoparticles (GO; SiO2); adsorption; ICP-MS; HEAVY-METAL IONS; HEXAVALENT CHROMIUM; AQUEOUS-SOLUTION; EFFICIENT REMOVAL; ENHANCED ADSORPTION; GRAPHITE OXIDE; CR(VI); NANOSHEETS; REDUCTION; POLLUTION;
D O I：
10.3390/cryst13071047
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Graphene-oxide-based nanomaterials have gained attention in recent years in the field of heavy metal removal. In this work, graphene oxide (GO) and graphene-oxide-coated silica nanoparticles (GO/SiO2) were synthesized for the efficient removal of Cr(VI) ions from water. Synthesized nanosorbents were characterized by FTIR, Raman spectroscopy, and Transmission Electron Microscopy (TEM). The effects of the pH and the concentration of Cr(VI) ions in adsorption, using GO and GO/SiO2, was studied using the batch process. The results of the study indicated that the maximum removal percentage was shown at pH 3 for both adsorbents. Comparatively, GO/SiO2 showed a higher removal percentage (92.28%) than GO (86.15%) for Cr(VI) at a concentration of 50 ppm. The results validate that the removal of Cr(VI) ions is highly concentration-dependent and pH-dependent. This study shows that GO and GO/SiO2 are efficient adsorbents and that GO/SiO2 has great potential over GO for the removal of Cr(VI) ions from water.
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页数：15
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